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零部件产品直滑式电位器的功能特点

文章出处:东莞市长鸿电子科技有限公司  编辑:[!--keyword--]  发表时间:2017-04-28 16:08:20

        一AG娱乐、骨架和基体
       骨架是线绕电位器电阻体的绝缘支承体?;?或基片)是非线绕电位器电阻体的支承体。
骨架和基体通常用绝缘性能良好的材料制成AG娱乐AG娱乐,要求耐热、耐潮、电绝缘性好AG娱乐,化学稳定性和导热性好,并只有一定的机械强度。一般有层压纸胶板、层压布被板、塑料、陶瓷、玻璃和表面经过绝缘处理的铜、铝和铝合金等i这种表面经绝缘处理的金属基体,应具有足够的表面绝缘性,这种骨架基体具有良好的散热性,也易于成形。
One, cytoskeleton and matrixThe skeleton is a wire-wound potentiometer resistor insulating supporting body. Matrix ( or substrate) is a non - wirewound potentiometers resistor body supporting body.Cytoskeleton and matrix generally good insulation performance, material, heat-resistant, resistant to moisture requirements, good insulation, chemical stability and good thermal conductivity, and only a certain mechanical strength. The general has a laminate sheet of paper, laminated cloth, plastic, ceramic, is plate glass and surface by insulation treatment of copper, aluminum and aluminum alloy I this surface by insulation treatment of the metal substrate, shall have adequate surface insulation, this framework substrate with good heat dissipation, but also is easy to be formed.
         二AG娱乐、电阻体
        电阻体是电位器中提供一定电阻值的电阻部件,它的电性能决定了电位器的主要电性能。电阻体应有良好的阻值稳定性,较小的电阻温度系数和静噪声。为了提高可靠性,它还应具有耐潮、耐热、耐磨、耐氧化AG娱乐、耐高负荷以及耐冷热骤变等性能AG娱乐。
接触式电位器的电阻体,动触点在其上接触并滑动,因此电阻体表面具有低的电阻率,使其与动触点的接触电阻??;同时表面电阻率应分布均匀AG娱乐,以保持在有效电行程内接触电阻变化和轨道电阻变化小,能得到较理想的电阻规律特性。电阻体表面应具有适当的光洁度AG娱乐,硬度和一定的耐磨性AG娱乐,以保证其机械耐久性。对线绕电位器是将电阻线材绕在骨架上,制成圆环形或螺旋形等电阻体,对薄膜或厚膜电位器,是公基板上形成电阻膜,形状多为马蹄形,圆弧形或长条形AG娱乐。对于合成实芯电位器AG娱乐,是在基座上压塑出马蹄形或长条形电阻轨。
In two, the resistance bodyResistor potentiometer to provide a resistance value of the resistor component, its electrical performance determines the potentiometer main electrical performance. The resistor body should have good resistance stability, small temperature coefficient of resistance and the static noise. In order to improve the reliability, it should also have a moisture resistant, heat resistant, wear resistance, oxidation resistance, high load and high thermal shock resistance.Contact type potentiometer resistance body, the movable contact in the contact and sliding, so the resistance body surface has a low electrical resistivity, and the movable contact of the contact resistance is small; simultaneously the surface resistivity should be distributed evenly, so as to maintain the effective electrical trip contact resistance variation and track resistance change is small, can get an ideal resistor law of property. The resistor body surface should have the appropriate degree of finish, hardness and wear resistance, in order to ensure its mechanical durability. The wire wound potentiometer resistance wire is wound around a framework, the shape of circle or spiral shape of thin or thick film resistor, potentiometer, is the public is formed on the substrate resistor film, shape is a horseshoe shaped, circular or rectangular. For the synthesis of solid potentiometer, is on the base pressure plastic horseshoe or strip-shaped resistor track.

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